fix whitespace problems in templates

unfortunately {% spaceless %} does not remove whitespace inside attribute values
Merge pull request #2 from stefanfoulis/feature/template-fixes

fix whitespace problems in templates
Tidy up python source code (removing spaces at end of lines, etc…).
Change buttons so that entering the url to like/share is always optional.
The "Share" button is deprecated in favour of the "Like" button, so remove it.
Merge pull request #4 from richardbarran/share-button-deprecated

Share button deprecated
Added Richard to AUTHORS. Thanks a lot!
Merge branch 'use-current-page' of https://github.com/richardbarran/cmsplugin_facebook into richardbarran-use-current-page

Removed conflicts - normally this should make the current trunk work.

Conflicts:
	cmsplugin_facebook/models.py
	cmsplugin_facebook/templates/cmsplugin_facebook/sharebutton.html
Add some help text to explain to end users what the different buttons do.
No need to name a plugin "XYZ plugin" - it's clear that it's a plugin.
Create a specific group for the Facebook plugins - makes it a bit neater in the list of plugins.
Sentences should end with a full-stop (apply to help_text on the models).
Merge pull request #5 from richardbarran/text-changes

Text changes